CN101547421B - Method for generating group mark randomly accessed to response message and random access method - Google Patents
Method for generating group mark randomly accessed to response message and random access method Download PDFInfo
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- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W74/0833—Random access procedures, e.g. with 4-step access
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Abstract
The invention discloses a method for generating a group mark randomly accessed to a response message and a random access method. The method for generating the group mark comprises that: a base station determines a range value N according to a configured time window parameter of a network, and determines the group mark according to the position of a random access time slot of a terminal at a subframe, the number of the random access time slot at a random access channel, and the range value N. By adopting the method, the terminal can be quickly and accurately accessed to a cellular wireless communication system and does not rely on the reading of a wireless frame number when the terminal determines the group mark in the random access response message; moreover, no matter how the configuration of the random access time slot changes, the group mark can be set by adopting the same method, and the method is convenient to realize.
Description
Technical field
The present invention relates to a kind of cellular radio communication system, relate in particular to a kind of group identification generation method and accidental access method of accidental access response message.
Background technology
As shown in Figure 1, mainly (CoreNetwork CN) forms cellular radio communication system by terminal, base station and core net.The network that the base station is formed is called wireless access network, and (Radio Access Network RAN) is responsible for the Access Layer affairs, such as the management of Radio Resource etc.Can there be physics or connection in logic according to actual conditions between the base station, like being connected of the base station among Fig. 11 and base station 2 or base station 3.Each base station can be connected with one or more than one core net node.Core net is responsible for the Non-Access Stratum affairs, such as position renewal etc., and is the anchor point of user plane.The terminal is meant the various device that can carry out communication with the cellular radio communication network, such as mobile phone or notebook computer etc.
Cellular radio communication system is that base unit identifies with the radio frames on system time, and the numbering of these radio frames is called SFN (radio frame number).The terminal can obtain the border of radio frames through the mode of Cell searching, thereby on descending, obtains time synchronized.In the such cellular radio communication system of LTE (long evolving system); The length of radio frames is 10ms (millisecond), and is as shown in Figure 2, for FDD (FDD) pattern; In a radio frames, comprise 10 sub-frame; 1 millisecond of each subframe duration, each subframe comprise two time slots, 0.5 millisecond of each time slot; As shown in Figure 3, for TDD (time division duplex) pattern, a frame is made up of 2 fields; 5 milliseconds of durations, each field comprises 5 sub-frame, 1 millisecond of each subframe duration; Except No. 1 with the 6 work song frames, other subframes also have two time slots, and wherein the duration of subframe and time slot is identical with fdd mode; No. 1 and 6 work song frames are made up of 3 special time slots, are called DwPTS respectively, GP and UpPTS.
For the LTE system, random access time slot is long 1 millisecond normally, promptly takies the length of 1 sub-frame, has also introduced the random access time slot of expansion in addition, can take 2 sub-frame length.The short random access time slot that tdd mode is also introduced sends on described UpPTS time slot.
Fdd mode, on time domain any sub-frame all possible configuration become random access time slot, on frequency domain, have only a RACH.Tdd mode; On time domain; No. 0 and 5 work song frames are descending time slot always, so can't be configured to random access time slot, the UpPTS time slot in No. 1 and the 6 work song frames can dispose random access time slot; Whether other time slots in addition can dispose the collocation method that random access time slot depends on uplink and downlink time slot in the tdd frame structure, are configured to up subframe and can be used as random access time slot.Tdd mode can have a plurality of RACHs on the frequency domain.
In the prior LTE system, the process that cellular radio communication system is inserted at the terminal at random comprises following three steps:
Step a, random access guiding message is sent to the base station in the terminal on certain random access time slot of radio frames;
Step b, the base station is to the terminal responds accidental access response message;
Step c, the terminal has judged whether to receive correct response message according to the index of group identification in the accidental access response message and random access guiding.
Among the step a; On identical random access time slot, have one or more than one terminal and send random access guiding message to the base station; These random access guiding message might be different; Also maybe be identical, different random access guiding message can be identified in the base station on identical random access time slot.
Among the step b, may comprise response message in the accidental access response message to one or more than one random access guiding message.These random access guiding message all are to send over from identical random access time slot.Being incorporated in a way in the response message more than one accidental access response information mainly is in order to improve the utilance of random access procedure on Radio Resource.In order to let terminal recognition go out this accidental access response message, group identification can be added in the base station in this message, has corresponding relation between the random access time slot of this group identification and transmission random access guiding.Also comprise a private label corresponding simultaneously in the accidental access response message with random access guiding message itself; Be generally the call number of random access guiding; The method to set up of group identification is stipulated in agreement in advance; Certain terminal has just known that it will receive what group identification and private label when random access guiding message is sent in the base station.
In order to keep the accidental access response process to have certain flexibility, the accidental access response message random access guiding message synchronization of on time domain, getting along well, promptly there is not fixing relation in both on time domain; On the contrary, allow accidental access response message in a time window, to send.Simultaneously in order to increase the flexibility of wireless resource scheduling; Be the random access guiding message that response receives in certain random access time slot, transmission and above-mentioned random access guiding message corresponding random access response message can be gone up by one or more TTI (Transmission Time Interval) in above-mentioned time window in the base station.The time started of this time window is relevant with the speed of base station processes random access guiding message, and the load of concluding time and base station processes random access guiding message and scheduling give the factors such as Radio Resource of accidental access response message relevant.
Among the step c, when the terminal received 1 accidental access response message in the official hour window after, it at first verified the group identification that whether has comprised expectation in this message; If comprised the group identification of expectation in this message, whether also comprise the private label (like call number) corresponding again in the authentication response information with the random access guiding message of being sent; If comprised the private label (like call number) of expectation, just can confirm that current accidental access response message is corresponding with the random access guiding message of sending.
In the existing disclosed technology, proposed in step b, to be provided with the method for group identification.General these methods can be calculated a group identification according to the absolute position of random access time slot on system time, make this group identification unique in the official hour scope.The defective of these methods is that at first the terminal need obtain the absolute system time that random access time slot belongs to honeycomb; Generally be meant SFN, but in practical application, in handoff procedure, possibly can't know the SFN of target cell in advance such as the terminal; This just can't calculated group identify; And for the SFN that obtains target cell often needs extra delay and system handles, such as read system message, because SFN normally broadcasts in system message.
Summary of the invention
The technical problem that the present invention will solve provides a kind of group identification generation method and accidental access method of accidental access response message, and the terminal is linked in the cellular radio communication system fast and accurately.
In order to address the above problem; The invention provides a kind of group identification generation method of accidental access response message; A value range N is confirmed according to the time window parameter of network configuration in the base station; And according to the position of terminal random access time slot place subframe and the numbering of random access time slot place RACH, and said value range N confirms group identification.
Further, the method according to the definite value range N of the time window parameter of system configuration is: whether the length of judging said time window is smaller or equal to 5 milliseconds, if the value of N is 5, otherwise the value of N is 10.
Further, said value range N is a constant, and its value is 2,5 or 10.
Further, said predetermined group identification is confirmed according to following formula:
Group identification=RA-RNTI-COUNT+Sn%N+m * N
Sn representes the numbering of random access time slot place subframe; Value range N according to the length of window mapping; M representes the numbering of random access time slot place RACH, and % is the modulo operation symbol; RA-RNTI-COUNT is the constant of default.
Further, said random access time slot is expansion during random access time slot, and the numbering Sn of random access time slot place subframe is meant the subframe numbering of starting position in a plurality of subframes that random access time slot takies.
The present invention also provides a kind of accidental access method of cellular radio communication system; The terminal is sent random access guiding message through random access time slot to the base station; And according to the generation method of predetermined group identification; According to the position of said random access time slot place subframe, the numbering of said random access time slot place RACH, and the value range N that confirms according to the time window parameter of system configuration confirms the group identification that expectation is received;
Said base station adopts said group identification generation method to confirm group identification, adds in the accidental access response message together with the index of random access guiding, and accidental access response message is sent to said terminal;
When the said group identification in its said accidental access response message of receiving of said terminal judges and the index of said random access guiding are respectively the desired value of confirming at the terminal, confirm that then said accidental access response message is the response message corresponding to the said random access guiding message of its transmission.
Further, said terminal according to the method for the definite value range N of the time window parameter of system configuration is: whether the length of judging said time window is smaller or equal to 5 milliseconds, if the value of N is 5, otherwise the value of N is 10; Perhaps said value range N is a constant, and its value is 2,5 or 10.
Further, the said time window parameter that inserts is at random read at said terminal from common signaling, and said common signaling comprises system message; The said time window parameter that inserts is at random read at perhaps said terminal from dedicated signaling, said dedicated signaling comprises switching command message.
Further, said predetermined group identification is confirmed according to following formula:
Group identification=RA-RNTI-COUNT+Sn%N+m * N
Sn representes the numbering of random access time slot place subframe; Value range N according to the length of window mapping; M representes the numbering of random access time slot place RACH, and % is the modulo operation symbol; RA-RNTI-COUNT is the constant of default.
Further, said random access time slot is expansion during random access time slot, and the numbering Sn of random access time slot place subframe is meant the subframe numbering of starting position in a plurality of subframes that random access time slot takies.
Adopt method of the present invention; Can make the terminal be linked in the cellular radio communication system fast and accurately and can not rely on reading of SFN when confirming the group identification in the accidental access response message at the terminal, this is even more important for the random access procedure that in handoff procedure, carries out.In addition, no matter how the configuration of random access time slot changes, and can adopt identical method that group identification is provided with, and is convenient to realize.
Description of drawings
Fig. 1 is the structure chart of cellular radio communication system in the prior art;
Fig. 2 is the wireless frame structure of LTE fdd mode in the prior art;
Fig. 3 is the wireless frame structure of LTE tdd mode in the prior art;
Fig. 4 is the flow chart of the accidental access method of cellular radio communication system among the present invention.
Embodiment
To combine accompanying drawing and embodiment that technical scheme of the present invention is explained in more detail below.
As shown in Figure 4, the accidental access method of cellular radio communication system may further comprise the steps:
In step 402, comprise also in the accidental access response message that the base station is the ascending wireless resource of terminal distribution, in the step 403, the terminal is sent message or data through above-mentioned ascending wireless resource to the base station after having confirmed to receive the accidental access response message of expectation.
In step 401 or 402, the generation method of group identification comprises:
A value range N is confirmed according to the time window parameter of network configuration in the base station, and according to the position of terminal random access time slot place subframe and the numbering of random access time slot place RACH, and said value range N confirms group identification.
In the said method, confirm the RA-RNTI corresponding with random access time slot according to following formula:
RA-RNTI＝RA-RNTI-COUNT+Sn％N+m×N (1)
Wherein, Sn refers to that random access time slot belongs to the numbering of subframe in radio frames; Random access time slot is expansion during random access time slot, and Sn refers to the subframe numbering of starting position in a plurality of subframes that random access time slot takies; In tdd mode,, be meant 1 or 6 work song frames so if random access time slot takies the UpPTS time slot;
N representes the parameter definite according to the time window length of terminal receiving random access response message.For example time window was smaller or equal to 5 o'clock, and the N value is 5 so; Otherwise the N value is 10; N also can be a constant, and getting fixing value is 2,5 or 10.Time window length is system configuration, and the terminal is known such as system message such as switching command or common signaling through dedicated signaling.
M is the numbering of this random access time slot place RACH.During the FDD situation, only can dispose a RACH, m is always 0; During the TDD situation, many RACHs can be set, m maybe be greater than 0.
% representes the modulo operation symbol, and Sn%N refers to the mould of Sn to N, and promptly P1 is divided exactly the remainder of P2.
RA-RNTI-COUNT is the constant of a default, and is identical to the identical number of bits that promptly takies of length of the identify label C-RNTI at terminal with system configuration.The value of RA-RNTI-COUNT can be for being set at 0.
For example for fdd mode, the value of m is 0, supposes that the time of reception window is 4, and then N is 5, and the corresponding RA-RNTI of random access guiding message that (being that Sn is 3) sends on 3 work song frames so is that RA-RNTI-COUNT+3%5 is RA-RNTI-COUNT+3; The corresponding RA-RNTI of the random access guiding message that (being that Sn is 7) sends on 7 work song frames is that RA-RNTI-COUNT+7%5 is RA-RNTI-COUNT+2.
For example for tdd mode; Suppose to have disposed 3 RACHs; The time of reception window is 6; Then N is 10, and going up the corresponding RA-RNTI of random access guiding message that sends at the 3 work song frames (Sn is 3) of the 0th RACH (m is 0) so is that RA-RNTI-COUNT+3%10+0*10 is RA-RNTI-COUNT+3; Going up the corresponding RA-RNTI of random access guiding message that sends at the 7 work song frames (Sn is 7) of the 2nd RACH (m is 2) is that RA-RNTI-COUNT+7%10+2*10 is RA-RNTI-COUNT+27.
According to above-mentioned formula, through definite method of following two specific embodiments explanation RA-RNTI.Suppose that the RA-RNTI-COUN that relates in the formula (1) is 0X2008 (with a hexadecimal representation).
Specific embodiment one: in fdd mode, suppose that the time of reception length of window is 4 milliseconds, then N is 5, and the subframe numbering of sending random access guiding is Sn, so:
RA-RNTI=0X2008+Sn%5, wherein the scope of Sn is 0～9.
During Sn=3, RA-RNTI=0X2008+3=0X200B so
During Sn=6, RA-RNTI=0X2008+1=0X2009 so
Specific embodiment two: in tdd mode, suppose that the time of reception window is 6 milliseconds, then N=10; Send random access guiding time slot place subframe and be numbered Sn, the numbering of the RACH at random access guiding time slot place is m, so:
RA-RNTI=0X2008+Sn%10+m * 10, wherein the scope of Sn is 1,2,3,4,6,7,8,9.
When m=0 and Sn=1, RA-RNTI=0X2008+1=0X2009
When m=1 and Sn=3, RA-RNTI=0X2008+3+10=0X2015
When m=2 and Sn=6, RA-RNTI=0X2008+6+20=0X2022
In the above-mentioned formula, the direct operation with metric Sn%10 and m * 10 additions of hexadecimal 0X2008 is intended to make things convenient for understanding formula (1).
The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art are when making various corresponding changes and distortion according to the present invention, and these change and be out of shape the protection range that all should belong to the appended claim of the present invention accordingly.
Claims (8)
1. the group identification generation method of an accidental access response message is characterized in that,
A value range N is confirmed according to the time window parameter of network configuration in the base station, and according to the position of terminal random access time slot place subframe and the numbering of random access time slot place RACH, and said value range N confirms group identification;
Wherein, said group identification is confirmed according to following formula:
Group identification=RA-RNTI-COUNT+Sn%N+m * N
Sn representes the numbering of random access time slot place subframe; Value range N according to the length of window mapping; M representes the numbering of random access time slot place RACH, and % is the modulo operation symbol; RA-RNTI-COUNT is the constant of default.
2. the method for claim 1 is characterized in that,
Method according to the definite value range N of the time window parameter of network configuration is: whether the length of judging said time window is smaller or equal to 5 milliseconds, if the value of N is 5, otherwise the value of N is 10.
3. the method for claim 1 is characterized in that,
Said value range N is a constant, and its value is 2,5 or 10.
4. like claim 1,2 or 3 described methods, it is characterized in that,
Said random access time slot is expansion during random access time slot, and the numbering Sn of random access time slot place subframe is meant the subframe numbering of starting position in a plurality of subframes that random access time slot takies.
5. the accidental access method of a cellular radio communication system is characterized in that,
The terminal is sent random access guiding message through random access time slot to the base station; And according to the generation method of predetermined group identification; According to the position of said random access time slot place subframe, the numbering of said random access time slot place RACH, and the value range N that confirms according to the time window parameter of system configuration confirms the group identification that expectation is received;
Said base station adopts said group identification generation method to confirm group identification, adds in the accidental access response message together with the index of random access guiding, and accidental access response message is sent to said terminal;
When the said group identification in its said accidental access response message of receiving of said terminal judges and the index of said random access guiding are respectively the desired value of confirming at the terminal, confirm that then said accidental access response message is the response message corresponding to the said random access guiding message of its transmission;
Wherein, said predetermined group identification is confirmed according to following formula:
Group identification=RA-RNTI-COUNT+Sn%N+m * N
Sn representes the numbering of random access time slot place subframe; Value range N according to the length of window mapping; M representes the numbering of random access time slot place RACH, and % is the modulo operation symbol; RA-RNTI-COUNT is the constant of default.
6. method as claimed in claim 5 is characterized in that,
Said terminal according to the method for the value range N that the time window parameter of system configuration is confirmed is: whether the length of judging said time window is smaller or equal to 5 milliseconds, if the value of N is 5, otherwise the value of N is 10; Perhaps said value range N is a constant, and its value is 2,5 or 10.
7. method as claimed in claim 5 is characterized in that,
The said time window parameter that inserts is at random read at said terminal from common signaling, said common signaling comprises system message; The said time window parameter that inserts is at random read at perhaps said terminal from dedicated signaling, said dedicated signaling comprises switching command message.
8. like claim 5 or 6 described methods, it is characterized in that,
Said random access time slot is expansion during random access time slot, and the numbering Sn of random access time slot place subframe is meant the subframe numbering of starting position in a plurality of subframes that random access time slot takies.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100875309A CN101547421B (en) | 2008-03-25 | 2008-03-25 | Method for generating group mark randomly accessed to response message and random access method |
| PCT/CN2008/072258 WO2009117881A1 (en) | 2008-03-25 | 2008-09-03 | A method for generating the group id of the random access response message, and a random access method |
| EP08800770.3A EP2271139B1 (en) | 2008-03-25 | 2008-09-03 | A method for generating the group ID of the random access response message, and a random access method |
| RU2010143321/07A RU2469475C2 (en) | 2008-03-25 | 2008-09-03 | Method of generating random access reply message group identifier and random access method |
| JP2011501085A JP5383789B2 (en) | 2008-03-25 | 2008-09-03 | Random access response message group ID generation method and random access method |
| US12/934,646 US8717985B2 (en) | 2008-03-25 | 2008-09-03 | Method for generating the group identifier of the random access response message, and a random access method |
| KR1020107023817A KR101208808B1 (en) | 2008-03-25 | 2008-09-03 | A method for generating the group id of the random access response message, and a random access method |
| PCT/CN2009/070573 WO2009117913A1 (en) | 2008-03-25 | 2009-02-27 | Group identifier generation method and random access and response method and mobile terminal |
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| CN2008100875309A CN101547421B (en) | 2008-03-25 | 2008-03-25 | Method for generating group mark randomly accessed to response message and random access method |
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| CN101547421A CN101547421A (en) | 2009-09-30 |
| CN101547421B true CN101547421B (en) | 2012-06-13 |
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| US (1) | US8717985B2 (en) |
| EP (1) | EP2271139B1 (en) |
| JP (1) | JP5383789B2 (en) |
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| CN (1) | CN101547421B (en) |
| RU (1) | RU2469475C2 (en) |
| WO (2) | WO2009117881A1 (en) |
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| RU2469475C2 (en) | 2012-12-10 |
| EP2271139A1 (en) | 2011-01-05 |
| JP5383789B2 (en) | 2014-01-08 |
| WO2009117913A1 (en) | 2009-10-01 |
| RU2010143321A (en) | 2012-04-27 |
| CN101547421A (en) | 2009-09-30 |
| KR20110007603A (en) | 2011-01-24 |
| US8717985B2 (en) | 2014-05-06 |
| KR101208808B1 (en) | 2012-12-06 |
| EP2271139B1 (en) | 2013-10-16 |
| US20110058572A1 (en) | 2011-03-10 |
| JP2011515971A (en) | 2011-05-19 |
| EP2271139A4 (en) | 2011-10-12 |
| WO2009117881A1 (en) | 2009-10-01 |
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